91652521 has 2 divisors, whose sum is σ = 91652522. Its totient is φ = 91652520.

The previous prime is 91652513. The next prime is 91652527. The reversal of 91652521 is 12525619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90630400 + 1022121 = 9520^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 91652521 - 2³ = 91652513 is a prime.

It is not a weakly prime, because it can be changed into another prime (91652527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45826260 + 45826261.

It is an arithmetic number, because the mean of its divisors is an integer number (45826261).

Almost surely, 2^91652521 is an apocalyptic number.

It is an amenable number.

91652521 is a deficient number, since it is larger than the sum of its proper divisors (1).

91652521 is an equidigital number, since it uses as much as digits as its factorization.

91652521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 91652521 is about 9573.5323157129. The cubic root of 91652521 is about 450.8666770776.

The spelling of 91652521 in words is "ninety-one million, six hundred fifty-two thousand, five hundred twenty-one".